I can't hear ANYTHING on my computer!!! PLEASE help!!!?

click start-click control panel-double click sounds and audio device-make sure its not on mute-click on hardware look if all devices working properly-click voice look for the default device and click audio look for your default device as well.you can adjust there too the sounds volume.look at the lower right hand side of your computer you will see a speaker logo click on that and adjust your volume.